{"cve":"CVE-2020-13946","nvd":{"published":"2020-09-01T21:15:11.833","modified":"2026-06-17T02:53:57.463","status":"Modified","description":"In Apache Cassandra, all versions prior to 2.1.22, 2.2.18, 3.0.22, 3.11.8 and 4.0-beta2, it is possible for a local attacker without access to the Apache Cassandra process or configuration files to manipulate the RMI registry to perform a man-in-the-middle attack and capture user names and passwords used to access the JMX interface. The attacker can then use these credentials to access the JMX interface and perform unauthorised operations. Users should also be aware of CVE-2019-2684, a JRE vulnerability that enables this issue to be exploited remotely.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-668"],"references":["https://lists.apache.org/thread.html/r1fd117082b992e7d43c1286e966c285f98aa362e685695d999ff42f7%40%3Cuser.cassandra.apache.org%3E","https://lists.apache.org/thread.html/r718e01f61b35409a4f7a3ccbc1cb5136a1558a9f9c2cb8d4ca9be1ce%40%3Cuser.cassandra.apache.org%3E","https://lists.apache.org/thread.html/rab8d90d28f944d84e4d7852f355a25c89451ae02c2decc4d355a9cfc%40%3Cuser.cassandra.apache.org%3E","https://lists.apache.org/thread.html/rcd7544b24d8fc32b7950ec4c117052410b661babaa857fb1fc641152%40%3Cuser.cassandra.apache.org%3E","https://security.netapp.com/advisory/ntap-20210521-0005/"],"products":["apache:cassandra","netapp:oncommand_insight"],"source":"nvd","synced_at":"2026-10-19T21:09:20.498348299+00:00"},"epss":{"cve":"CVE-2020-13946","score":0.02951,"percentile":0.87172,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-24ww-mc5x-xc43","url":"https://osv.dev/vulnerability/GHSA-24ww-mc5x-xc43","summary":"Man-in-the-middle attack in Apache Cassandra","modified":"2026-09-10T03:49:04.319299574Z","packages":[{"ecosystem":"Maven","name":"org.apache.cassandra:cassandra-all","purl":"pkg:maven/org.apache.cassandra/cassandra-all","ranges":[">=2.1.0 <2.1.12"],"fixed":["2.1.12"]},{"ecosystem":"Maven","name":"org.apache.cassandra:cassandra-all","purl":"pkg:maven/org.apache.cassandra/cassandra-all","ranges":[">=2.2.0 <2.2.18"],"fixed":["2.2.18"]},{"ecosystem":"Maven","name":"org.apache.cassandra:cassandra-all","purl":"pkg:maven/org.apache.cassandra/cassandra-all","ranges":[">=3.0.0 <3.0.22"],"fixed":["3.0.22"]},{"ecosystem":"Maven","name":"org.apache.cassandra:cassandra-all","purl":"pkg:maven/org.apache.cassandra/cassandra-all","ranges":[">=3.11.0 <3.11.8"],"fixed":["3.11.8"]},{"ecosystem":"Maven","name":"org.apache.cassandra:cassandra-all","purl":"pkg:maven/org.apache.cassandra/cassandra-all","ranges":[">=4.0-beta1 <4.0-beta2"],"fixed":["4.0-beta2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}